* WHAT...Flash flooding caused by excessive rainfall is possible due to thunderstorms. * WHERE...Portions of east central California, including the following area, Mono County and western Nevada, including the following area, Mineral and Southern Lyon Counties. * WHEN...From Monday afternoon through Monday evening. * IMPACTS...Excessive runoff may result in flooding of creeks, streams, urban areas, burn scars, and areas near steep terrain. * ADDITIONAL DETAILS... - Deeper monsoonal moisture combined with daytime heating will produce scattered thunderstorms Monday afternoon and evening. Slower moving storms could redevelop over similar areas, increasing the risk for heavy rainfall capable of producing flash flooding. - http://www.weather.gov/safety/flood